Elastic Laminate Frangible Pathways for Tear-Off Diaper Removal
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Solution Overview
Problem
Existing absorbent articles with elastic laminates face challenges in consistently cutting elastic strands at frangible pathways, leading to potential weakening of the laminate, premature opening, and handling difficulties during assembly and use, especially in pant-style diapers where removal is required without sliding down the legs.
Innovation Solution
A method and apparatus for forming frangible pathways in elastic laminates by cutting elastic strands at lines of weakness, ensuring all strands are severed, with some strands cut once and others cut multiple times, using a knife roll to create these pathways and maintain laminate strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If liquid distribution pathways are formed by perforations in the liquid distribution layer, then liquid can be distributed across the absorbent article, but the pathways may become clogged with fecal matter reducing distribution efficiency
Solution Approach 1:
The liquid distribution system is segmented into multiple independent pathways (first plurality and second plurality of pathways) rather than relying on a single network of perforations. This segmentation allows liquid to be distributed through multiple routes, reducing the impact of clogging in any single pathway and maintaining overall distribution efficiency.
Solution Approach 2:
A liquid redistribution layer is introduced as an intermediary component between the liquid distribution layer and the absorbent core. This intermediary layer receives liquid from the distribution pathways and redistributes it, providing an additional mechanism that prevents direct clogging of the original pathways and ensures continuous liquid flow to the core.
2Adaptability or versatility
If the absorbent article structure is made more complex to enable disassembly and reconfiguration, then adaptability to different infants and usage scenarios is improved, but manufacturing complexity and device complexity increase
Solution Approach 1:
The absorbent article incorporates frangible (breakable) pathways and separable components that allow the structure to be dynamically reconfigured. The liquid distribution layer can be separated from the absorbent core, and pathways can be broken or opened to create different configurations, enabling the same basic structure to adapt to different infant sizes and usage scenarios without requiring entirely different designs.
Solution Approach 2:
The absorbent article is divided into separable segments including the liquid distribution layer, absorbent core, and fastening components. This segmentation allows the article to be disassembled and reconfigured for different fits and usage scenarios, providing versatility while maintaining relatively simple individual components that are easier to manufacture.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables easy removal of pant-style diapers by tearing along frangible pathways without breaking elastic strands, maintaining laminate strength and reducing assembly and handling difficulties.
Implementation Method 1
the pathway has a frangible portion that breaks apart when a predetermined amount of force is applied to the absorbent article
Implementation Method 2
an absorbent core positioned between the first and second surfaces and configured to absorb liquid
Data Source
Figure 1
Figure 1A
Figure 2A
AI summary
The present disclosure relates to absorbent articles including elastic laminates, and more particularly, to methods and apparatuses for making absorbent articles having elastic laminates in front and/or back waist regions with frangible pathways.